Three-dimensional comparison of 2 digital models obtained from cone-beam computed tomographic scans of polyvinyl siloxane impressions and plaster models

Jin Yi Park, Dasomi Kim, Sang Sun Han, Hyung Seog Yu, Jung Yul Cha

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Purpose: This study was performed to evaluate the dimensional accuracy of digital dental models constructed from cone-beam computed tomographic (CBCT) scans of polyvinyl siloxane (PVS) impressions and cast scan models. Materials and Methods: A pair of PVS impressions was obtained from 20 subjects and scanned using CBCT (resolution, 0.1 mm). A cast scan model was constructed by scanning the gypsum model using a model scanner. After reconstruction of the digital models, the mesio-distal width of each tooth, inter-canine width, and inter-molar width were measured, and the Bolton ratios were calculated and compared. The 2 models were superimposed and the difference between the models was measured using 3-dimensional analysis. Results: The range of mean error between the cast scan model and the CBCT scan model was-0.15 mm to 0.13 mm in the mesio-distal width of the teeth and 0.03 mm to 0.42 mm in the width analysis. The differences in the Bolton ratios between the cast scan models and CBCT scan models were 0.87 (anterior ratio) and 0.72 (overall ratio), with no significant difference (P>0.05). The mean maxillary and mandibular difference when the cast scan model and the CBCT scan model were superimposed was 53 μm. Conclusion: There was no statistically significant difference in most of the measurements. The maximum tooth size difference was 0.15 mm, and the average difference in model overlap was 53 μm. Digital models produced by scanning impressions at a high resolution using CBCT can be used in clinical practice.

Original languageEnglish
Pages (from-to)257-263
Number of pages7
JournalImaging Science in Dentistry
Volume49
Issue number4
DOIs
Publication statusPublished - 2019 Dec 1

Bibliographical note

Funding Information:
The study was based on work supported by the Ministry of Trade, Industry & Energy (MOTIE, Korea) under the Advanced Technology Center Program. No.10062362, 'The development of dental and medical prosthetics modeling, rapid fabrication and integrated trading system based and converged on CBCT image, using Cloud networking.'

Funding Information:
*The study was based on work supported by the Ministry of Trade, Industry & Energy (MOTIE, Korea) under the Advanced Technology Center Program. No.10062362, ‘The development of dental and medical prosthetics modeling, rapid fabrication and integrated trading system based and converged on CBCT image, using Cloud networking.’ Received June 26, 2019; Revised August 19, 2019; Accepted August 30, 2019 *Correspondence to : Prof. SangSun Han Department of Oral and Maxillofacial Radiology, College of Dentistry, Yonsei University, 501 Yonseiro, Seodaemungu, Seoul 03722, Korea Tel) 82222288843, Email) sshan@yuhs.ac Prof. JungYul Cha Department of Orthodontics, College of Dentistry, Yonsei University, 501 Yonseiro, Seodaemungu, Seoul 03722, Korea Tel) 82222283103, Email) jungcha@yuhs.ac

Publisher Copyright:
© 2019 by Korean Academy of Oral and Maxillofacial Radiology.

All Science Journal Classification (ASJC) codes

  • Radiological and Ultrasound Technology
  • Dentistry(all)
  • Radiology Nuclear Medicine and imaging

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